Here's how to attempt it, but remember – proceed with extreme caution:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental short circuits.
2. Access the Crankshaft: Locate the crankshaft pulley (the large pulley at the front of the engine). You'll need to remove some components to access it depending on what you are trying to accomplish. This will vary; sometimes a simple socket and ratchet will work, while other times significant disassembly (removing belts, possibly the fan shroud) is necessary. Consult a repair manual for your specific engine and year.
3. Appropriate Tool: Use a properly sized socket (usually a 19mm or 22mm) that fits snugly over the crankshaft pulley bolt. Do not use a breaker bar or anything that provides excessive leverage. A ratchet or wrench with a long handle will provide enough torque if the engine is not seized.
4. Turn Slowly and Carefully: Slowly and smoothly turn the crankshaft bolt clockwise (as viewed from the front of the engine). Feel for resistance. If you encounter significant resistance, stop immediately. Do not force it. Forcing the engine could cause serious damage to the engine's internal components.
5. Feel for Compression: As you turn the crankshaft, you should feel some resistance. This is normal compression. If you feel no resistance at all, something is seriously wrong (likely a seized engine or broken connecting rod).
6. Full Rotation: Try to turn the engine over at least two full rotations. This ensures you're checking the entire rotation.
Important Considerations:
* Repair Manual: A repair manual specific to your 2001 Chrysler Sebring 2.7L is crucial. It will show you exactly which components need to be removed for crankshaft access, the correct bolt size, and proper procedures.
* Seized Engine: If the engine is seized (completely locked up), you won't be able to turn it over by hand. This indicates a much more serious mechanical problem requiring professional attention.
* Timing Belt/Chain: If you have reason to believe the timing belt or chain is broken, do not attempt to turn the engine over by hand. Doing so could cause catastrophic valve damage.
* Professional Help: If you are unsure about any step, seek the help of a qualified mechanic. Attempting this without the proper knowledge could result in significant engine damage and costly repairs.
This process is for diagnostic purposes only. If you are trying to diagnose a no-start condition, you should systematically check other parts of the starting system before resorting to this method. A seized engine is a serious issue.
